Quaker State 550035190 Heavy Duty SAE 30 Lubricant Motor Oil-1 Quart, 32. Fluid_Ounces Wear is one of the toughest enemies your engine faces. It can reduce engine life and rob you of power. That's why Quaker State HD motor oils are engineered to reduce wear and protect against high temperature and severe service operation. Quaker State HD motor oils meet or exceed API SN and prior API SM, SL, SJ service categories HD motor oil contains acid neutralizing additives to stop combustion acids from corroding your engine HD Motor Oil used oil (standard oil for the vehicle), still passed the Industry wear requirements. Provides stay in grade viscosity throughout the oil drain period